強(qiáng)調(diào)句型：It is/was +… who/that…；被強(qiáng)調(diào)部分如果為主格人稱代詞，who/that后的動(dòng)詞和主格人稱代詞在人稱和數(shù)上保持一致。

1. 如強(qiáng)調(diào)句型指現(xiàn)在或未來的情況用It is指過去用It was。

e.g. It is I who/ that am wrong.

分析：被強(qiáng)調(diào)部分為人強(qiáng)調(diào)詞可用who也可用that. 指現(xiàn)在的情況所以以 It is開頭，被強(qiáng)調(diào)部分是 I謂語用 “am”

原句： I am wrong.

e.g. It was him who\that I saw the day before yesterday.

原句為 I saw him the day before yesterday.

分析：指過去的情況用It was 開頭，被強(qiáng)調(diào)部分為人所以強(qiáng)調(diào)詞仍是who\that.

2. 被強(qiáng)調(diào)部分往往為句子的主語、賓語、時(shí)間狀語、地點(diǎn)狀語等，但有時(shí)也可以強(qiáng)調(diào)比較復(fù)雜的內(nèi)容。 如時(shí)間狀語從句、地點(diǎn)狀語從句、not until… 結(jié)構(gòu)、not only…but also…和as well as…等結(jié)構(gòu)。

e.g. It was only when I reread his poems recently that I began to appreciate their beauty. (appreciate means understand and enjoy the good qualities or value of something欣賞、鑒賞、領(lǐng)會(huì))

分析：強(qiáng)調(diào)部分為復(fù)雜的時(shí)間狀語從句強(qiáng)調(diào)詞不能使用when只可用that

e.g.It is not only he but also his parents who\that have been to Beijing.

3. 被強(qiáng)調(diào)部分為人稱代詞時(shí)，原句用什么格強(qiáng)調(diào)句也用什么格。

It強(qiáng)調(diào)句型最基本的句式結(jié)構(gòu)為：

It be＋被強(qiáng)調(diào)部分＋that/who＋句子。被強(qiáng)調(diào)部分是除謂語之外的其他句子成分，可以是單詞、短語，也可以是從句；當(dāng)強(qiáng)調(diào)人時(shí)，可以用who 或that；強(qiáng)調(diào)其他成分，則只能用that。對(duì)not……until……結(jié)構(gòu)的強(qiáng)調(diào)句型為：It is/ was not until+被強(qiáng)調(diào)部分+that+其他部分。